US1485211A - Renewable electric fuse - Google Patents

Description

Feb. 26 1924. .1,485,211

- T. BERGER RENEWABLE ELECTRIC FUSE Filed June 24. 1921 Thung/w1 Ke/gw 1,

Patented Feb. 26, 1924.

UNITED STATES c l 1,485,211 PATENT oFFicE.

THURSTON BERGER, F LINDSAY, CALIFORNIA, ASSIGNOR T0 J. P. BERGER, 0F LINDSAY, CALIFORNIA.

RENEWABLE ELECTRIC FUSE.'

Application led June 24, 1921. ASerial 110.480,153.

To all wlwm t may concern.'

Beit known that I, THUns'roN BERGER, a citizen of the United States, residing at Lindsay, in the county of Tulare and State sof California, have invented new andr useful Improvements in Renewable Electric Fuses, of which the following is a specification.

This invention relates to improvements in io fuses of the cartridge type.

y The principal obJect of this invention is to lproduce a fuse, which may be renewed.

nother object is to produce a fuse which will be simple in construction, cheap to 16 manufacture and one which may be used with different size fuse'wires.

A further object is to produce a fuse wherein the fuse wire which is inserted will be forced into intimate contact with the end caps in order to insure perfect electrical transmission.

-A still further object is to produce a fuse having a finger piece so that the fuse as a whole may be removed from the fuse block for renewal.

Other objects and advantages of the invention will be apparent during the course of the following' description In the accompanying drawings forming 30 part of this specification, and in which like numerals are em loyed to designate like parts throughout t e same,

Fig. 1 is a side view of my improved fuse,

Fig. 2 is a cross section taken on the line 2 2 of F ig. 1, v

Fig. 3 is a detail perspective view of the primarycap.

F-ig. 4 is an en d view of the secondary cap potion into which the primary cap fits, an

Fig. 5 is a perspective view of the insulating member as a whole.v

In the transmission .of current fuses are used, which are adapted to be inserted between metallic clips.

Up to the present time, so far as applicant is aware, these fuses have been so constructed that the same were thrown away after burning out, and if one lacked another fuse, they Were forced to go without power or current until a new fuse could be procured.

With this device a new fuse may be constructed by inserting a new fuse wire, as will be later described.

In the drawings wherein for the purpose of illustration is shown a preferred embodiment of my invention, the numeral 5 designates a cylindrical-insulating portion having reduced end portions 6 and 7. A hollow bore 8 extends through this insulating meniber and a finger piece 9 is preferably formed integral with the center portion 5. The reduced end portions 6 and 7 are each adapted to receive a metallic primary cap 11, which cap is provided with a central opening 12 therethrough. This opening communicates with V shaped recesses 13 and 14 of gradually decreasing depth as is best shown in Figures 2 and 3.

The interior of the p rimary cap 11 is formed as shown at 16 of Figure 2, that is, it is internally tapered toward the opening 12. This formation serves to guide the fuse wire through the opening 12. A secondary cap 17 is provided with a bayonet slot 16 adapted to receive the stud 17 formed on the primary cap 11 so as to operatively associate these members for a fitting engagement with each other.- In placing the cap 17 over the cap 11 it will force the fuse Wire lying within one fof the grooves, such as 13 or 14 into conta-ct with the two caps, as will be readily understood and is clearly shown in Figure 2 of the drawings. The fuse wire will retain these caps associated with the reduced end portions of the cylindrical insulating member 5.

The position of this fuse wire is best shown at 18y of Fig. 2.

It is understood that that the opposite ends of my fuse are identical so that it is necessary to describe but one of these.

In assembling, a fuse wire is passed through the center of the insulating member 5 and a primary cap is placed upon each end. The placing-of this cap on the insulating member allows the ends of the fuse wire to protrude through the openings 12.

These ends are then bent so as to lay in grooves such as shown at 13 and a secondary 'cap is forced over each end, with the result that the fuse is then'ready to be used.

By grasping the same by the finger piece 9, the fuse may be inserted in the fuse block without danger of receiving a shock.

It is to be understood that the form of my invention herewith shown and described is to be taken as a preferred example of the same, and that various changes inthe shape,

size and arrangement of the parts may be resorted to Without departing from the spirit of the invention, or the scope of the subjoined claims.

Having thus described myinvention, I claim In a fuse, the combination of a tubular insulating member having a depending finger piece, said insulating member being` provided With a tapered end portion, a primary cap internally tapered and adapted to fit the tapered end portion of said insulating member, a fuse adapted to extend through said insulating member and said primary cap, tapered recesses formed in said primary cap, and a secondary cap adapted to be forced over said primary ,cap Vfor the purpose of causing the end of said fuse to be tightly engaged in said tapered recesses.

In testimony whereof I aiX my signature. 20

THURSTON BERGER.

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